EP0384045B1 - Verfahren zur Herstellung einer metallurgischen Verbindung zwischen einem metallischen Material oder einem Verbundwerkstoff mit einer Metallmatrix und einem Metallguss oder Metall-Legierungsguss - Google Patents

Verfahren zur Herstellung einer metallurgischen Verbindung zwischen einem metallischen Material oder einem Verbundwerkstoff mit einer Metallmatrix und einem Metallguss oder Metall-Legierungsguss Download PDF

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Publication number
EP0384045B1
EP0384045B1 EP89202324A EP89202324A EP0384045B1 EP 0384045 B1 EP0384045 B1 EP 0384045B1 EP 89202324 A EP89202324 A EP 89202324A EP 89202324 A EP89202324 A EP 89202324A EP 0384045 B1 EP0384045 B1 EP 0384045B1
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EP
European Patent Office
Prior art keywords
metal
casting
process according
composite material
reinforcing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89202324A
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English (en)
French (fr)
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EP0384045A2 (de
EP0384045A3 (en
Inventor
Steven Antony Gedeon
Renato Guerriero
Ilario Tangerini
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Temav SpA
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Temav SpA
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Priority to AT89202324T priority Critical patent/ATE93754T1/de
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Publication of EP0384045A3 publication Critical patent/EP0384045A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/14—Casting in, on, or around objects which form part of the product the objects being filamentary or particulate in form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D19/00—Casting in, on, or around objects which form part of the product
    • B22D19/0081—Casting in, on, or around objects which form part of the product pretreatment of the insert, e.g. for enhancing the bonding between insert and surrounding cast metal

Definitions

  • the present invention relates to a process for obtaining a metallurgical bond between a metal material, or a composite material having a metal matrix, and a metal casting piece, or a metal-alloy casting according to the preamble of claim 1.
  • a process for obtaining a metallurgical bond between a metal material, or a composite material having a metal matrix, and a metal casting piece, or a metal-alloy casting according to the preamble of claim 1.
  • such a process makes it possible predetermined regions of stationary, or moving, mechanical components to be reinforced by means of the introduction of inserts, or makes it also possible two or more cast pieces to be coupled with one another.
  • the present Applicant has found now that by means of a suitable surface treatment of the material (either a reinforcing material or a material to be coupled), a strong metallurgical bond can be obtained between the same material and the casting.
  • the process according to the present invention which could be given the name of "welding by casting” or “cast-welding”, guarantees that all of the classic requirements of the welding operations are met: namely, the removal of the surface impurities and oxides, intimate contact and coalescence of the materials to be mutually bonded.
  • metals not easily coupled by means of other techniques can be bonded to each other by means of such a type of welding.
  • the process according to the present invention for obtaining a metallurgical bond between a metal material, or a composite material having a metal matrix, and a metal casting, or a metal-alloy casting is characterized by the features as laid out in the characterizing portion of claim 1.
  • the metal material which can be constituted by a single metal or by a metal alloy, or the metal-matrix composite can be, e.g., an insert for reinforcing predetermied regions of either stationary or moving mechanical components subject to wear, (such as guides, pistons, gearwheels, and so forth), or a cast piece to be coupled with one or more cast piece(s) on order to possibly constitute a complex shaped piece, which otherways cannot be obtained, or which can be difficultly obtained (owing to hindrances due to the geometry of the piece or to the type of material, or to a too high cost).
  • the metal composite material and the cast material can have different compositions, and the therein contained metals can be preferably selected from the group consisting of Al, Zn, Pb, Mg, Cu, Sn, In, Ag, Au, It and their alloys.
  • the material can also be a composite having a metal matrix: such a type of material is constituted by a metal phase (or by a metal-alloy phase), which surrounds and bonds other phases, which constitute the reinforcement (powders or ceramic fibres).
  • the reinforcement is endowed with high values of mechanical strength and hardness, and to it the stresses are transferred, which the matrix is submitted to; the matrix, in its turn, should display suitable characteristics as a function of the forecast application type.
  • the reinforcement can be constituted by long or short ceramic fibres (Al2O3, SiC, C, BN, SiO2, glass), or by ceramic "whiskers” (SiC, Si3N4, B4C, Al2O3), or by non-metal powders (SiC, BN, Si3N4, B4C, SiO2, Al2O3, glass, graphite), or by metal fibres (Be, W, SiC-coated W, B4C-coated W, steel).
  • the methods for preparing the composited can be the following:
  • the composite material can be obtained either directly, or by means of a subsequent mechanical machining.
  • the metal which constitutes the thin layer to be deposited in a thickness preferably comprised within the range of from 10 to 200 nm on the surface of the metal material or the metal-matrix composite material, which thin-layer metal may be different from the metals contained in the material and in the casting, can be preferably selected from the group consisting of Au, Ag, Cu, Ni, Pt, Pd, Cr, W, Ir, Mo, Ta, Nb, Os, Re, Rh, Ru and Zr.
  • the deposition of said thin layer can be preferably carried out by sputtering, or by means of an electrochemical deposition process.
  • the liquid to be submitted to the casting process will be capable of wetting the metal, or metal-matrix composite, material, to a high enough exent in order to transfer heat to it, to wash away the oxide layer existing on the surface of said material and to form a direct bond with the material, in case of a metal material, or with the metal matrix, in case of a composite material.
  • the operating parameters of the casting step have to be so adjusted, as to secure that a proper stream of overheated liquid laps the surfaces of the material.
  • the position of the material be suitably selected and that the shape of the downwards ducts (feed ducts) and of the upwards ducts (outflow) inside the mould be so studied as to oblige the liquid metal to lap, wet and wash the walls of the material before becoming too cold.
  • the metal materials can be obtained by means of techniques known from the prior art (e.g.: gravity casting, pressure casting, or “squeeze casting"), either, directly or with a subsequent processing step.
  • Example 4 was carried out in the same way as Example 1, with the following exceptions:
  • Example 5 was carried out in the same way as Example 2, with the following exceptions:
  • Example 6 was carried out in the same way as Example 3, with the following exceptions:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Laminated Bodies (AREA)
  • Mold Materials And Core Materials (AREA)

Claims (10)

  1. Verfahren zur Ausbildung einer metallurgischen Bindung zwischen:
    (a) einem Metallmaterial oder einem eine Metallmatrix aufweisenden Verbundmaterial, welches Verbundmaterial durch ein Verstärkungsmaterial, ausgewählt unter langen und kurzen keramischen Fasern, keramischen Whiskern, nicht-metallischen Pulvern und Metallfasern, verstärkt ist, und
    (b) einem Metall- oder Metallegierungsguß,
    worin die Metalle von (a) und (b) unter Al, Zn, Pb, Mg, Cu, Sn, In, Ag, Au, Ti und Legierungen hievon ausgewählt sind, welches Verfahren die Stufen einer Durchfuhrung einer Oberflächenbehandlung auf (a) durch Abscheiden einer dünnen Schicht aus einem Metall hierauf, welches Metall ein anderes ist als irgendeines der in (a) und (b) enthaltenen Metalle, des Anordnens von (a) in einer Form und des Gießens des Metalls oder der Metallegierung (b) um (a) umfaßt,
    dadurch gekennzeichnet, daß das Metall, das von den in (a) und (b) enthaltenen verschieden ist, unter Au, Ag, Ni, Pt, Pd, Cr, W, Ir, Mo, Ta, Nb, Os, Re, Rh und Zr ausgewählt ist, wobei die Abscheidung der genannten dünnen Schicht nach einer der folgenden Methoden erfolgt:
    - Sputtern;
    - Plasmaspritzen;
    - Laser-assistierte Abscheidung;
    - Thermo-Verdampfungsabscheidung;
    - Magnetron-assistierte Abscheidung und
    - Gasphasenabscheidung (CVD).
  2. Verfahren nach Anspruch 1, worin die keramischen Verstärkungsfasern für das Verbundmaterial (a) unter keramischen Fasern aus Al₂O₃, Sic, BN, SiO₂ und Glas ausgewählt sind.
  3. Verfahren nach Anspruch 1, worin die Verstärkungswhisker für das Verbundmaterial (a) unter Whiskern aus SiC, Si₃N₄, B₄C und Al₂O₃ ausgewählt sind.
  4. Verfahren nach Anspruch 1, worin die nicht-metallischen Verstärkungspulver für das Verbundmaterial (a) unter pulverförmigem SiC, BN, B₄C, Si₃N₄, SiO₂, Al₂O₃, Glas und Graphit ausgewählt sind.
  5. Verfahren nach Anspruch 1, worin die metallischen Verstärkungsfasern für das Verbundmaterial (a) unter Metallfasern aus Be, W, SiC-beschichtetem w, B₄C-beschichtetem w oder Stahl ausgewählt sind.
  6. Verfahren nach Anspruch 1, worin das Material (a) durch Schwerkraftgießen, Druckgießen oder Preßgießen hergestellt wird.
  7. Verfahren nach Anspruch 1, worin das Material (b) durch Schwerkraftgießen, Druckgießen oder Preßgießen hergestellt wird.
  8. Verfahren nach Anspruch 1, worin -das eine Metallmatrix aufweisende Verbundmaterial (b) durch Dispergieren des Verstärkungsmaterials in der Matrix im geschmolzenen oder im teilweise festen Zustand oder durch Pulvermetallurgie, Fasermetallisierung oder Schichtkompaktieren oder durch Infiltration hergestellt wird.
  9. Verfahren nach Anspruch 8, welches weiterhin eine Bearbeitungsstufe des erhaltenen Materials umfaßt.
  10. Verfahren nach Anspruch 1, worin die abgelagerte dünne Metallschicht eine Stärke von 10 nm bis 200 nm aufweist.
EP89202324A 1989-02-22 1989-09-15 Verfahren zur Herstellung einer metallurgischen Verbindung zwischen einem metallischen Material oder einem Verbundwerkstoff mit einer Metallmatrix und einem Metallguss oder Metall-Legierungsguss Expired - Lifetime EP0384045B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89202324T ATE93754T1 (de) 1989-02-22 1989-09-15 Verfahren zur herstellung einer metallurgischen verbindung zwischen einem metallischen material oder einem verbundwerkstoff mit einer metallmatrix und einem metallguss oder metalllegierungsguss.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8919516A IT1228449B (it) 1989-02-22 1989-02-22 Procedimento per ottenere un legame metallurgico tra un materiale metallico o composito a matrice metallica e un getto di metallo o di lega metallica.
IT1951689 1989-02-22

Publications (3)

Publication Number Publication Date
EP0384045A2 EP0384045A2 (de) 1990-08-29
EP0384045A3 EP0384045A3 (en) 1990-12-19
EP0384045B1 true EP0384045B1 (de) 1993-09-01

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Family Applications (1)

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EP89202324A Expired - Lifetime EP0384045B1 (de) 1989-02-22 1989-09-15 Verfahren zur Herstellung einer metallurgischen Verbindung zwischen einem metallischen Material oder einem Verbundwerkstoff mit einer Metallmatrix und einem Metallguss oder Metall-Legierungsguss

Country Status (10)

Country Link
US (1) US4980123A (de)
EP (1) EP0384045B1 (de)
JP (1) JPH02220759A (de)
CN (1) CN1045049A (de)
AT (1) ATE93754T1 (de)
BR (1) BR8905576A (de)
CA (1) CA1325706C (de)
DE (1) DE68908870T2 (de)
ES (1) ES2042977T3 (de)
IT (1) IT1228449B (de)

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FR2688154A1 (fr) * 1992-03-04 1993-09-10 Pechiney Recherche Procede d'obtention de pieces bimateriaux par surmoulage d'un insert revetu d'un film metallique.
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US6484790B1 (en) * 1999-08-31 2002-11-26 Cummins Inc. Metallurgical bonding of coated inserts within metal castings
US6443211B1 (en) * 1999-08-31 2002-09-03 Cummins Inc. Mettallurgical bonding of inserts having multi-layered coatings within metal castings
FR2803783B1 (fr) * 2000-01-13 2002-04-26 Valfond Argentan S A Piece bimetallique en alliage d'aluminium comportant un insert massif en titane ou alliage de titane
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CN110465643B (zh) * 2019-09-12 2021-02-26 江西省鹰潭铜产业工程技术研究中心 一种铜铌复合材料的制备方法

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Also Published As

Publication number Publication date
JPH02220759A (ja) 1990-09-03
EP0384045A2 (de) 1990-08-29
IT1228449B (it) 1991-06-19
CN1045049A (zh) 1990-09-05
CA1325706C (en) 1994-01-04
EP0384045A3 (en) 1990-12-19
ATE93754T1 (de) 1993-09-15
ES2042977T3 (es) 1993-12-16
DE68908870T2 (de) 1994-02-03
IT8919516A0 (it) 1989-02-22
BR8905576A (pt) 1991-04-30
US4980123A (en) 1990-12-25
DE68908870D1 (de) 1993-10-07

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